印染废水电渗析脱盐中试及影响因素  

Pilot-Plant Test and Influencing Factors of Electrodialytical Desalination for Printing and Dyeing Wastewater

作　　者：操家顺[1,2,3] 马宏伟[2] 李超[1,2] 

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098 [2]河海大学环境学院,江苏南京210098 [3]水文水资源高效利用与工程安全国家研究中心,江苏南京210098

出　　处：《净水技术》2015年第2期20-25,共6页Water Purification Technology

基　　金：国家科技重大专项(No.2012ZX07101-003)

摘　　要：以某印染厂高密度澄清池出水为处理对象,通过中试试验确定了电渗析法的极限电流密度,研究了电压、进水流量对电渗析处理工艺出水水质的影响。结果表明中试条件下电渗析器的极限电流为25 A、极限电流密度为11.57 m A/cm2、最佳电压为80 V、单位容积电渗析器进水流量为5.2 L/h。在最佳工艺运行条件下电渗析淡水电导率低至1 500μs/cm,脱盐率、脱硬率和脱氯率分别达到78.07%、85.88%和88.50%。脱盐速率随着电压增大逐渐增大,当电压为85 V时脱盐速率出现最大值(56.35 mg/L·s);脱盐速率随着流量的增大逐渐减小,当流量为1 100 L/h时脱盐速率出现最小值(54.40 mg/L·s)。电渗析脱盐成本低,具有广阔的应用前景。In this study, a pilot-plant experiment was carried out to investigate influencing factors of electrodialysis desalination for printing and dyeing wastewater. The results show that under this experiment condition the limiting current is 25 A, the limiting current density is 11.57 mA/cm, the optimum voltage is 80 V and a unit volume influent flow is 5.2 L/h. Under the optimum operating conditions, the conductivity of electrodialysis fresh water drops to 1 500 μS/cm ; while desalination rate, removal rate of hardness and dechlorination rate are 78.07%, 78.07% and 78.07% , respectively. Desalination rate increases with the increase of voltage, which reaches at a maximum of 56.35 mg/L ~ s when voltage is 85 V. On the contrary, the desalination rate gradually reduces with the increase of influent flow, which reaches at a minimum of 54.40 mg/L · s when influent flow is 1 100 L/h. Moreover, desalination by electrodialysis has a broad application prospect for its low costs.

关 键 词：电渗析 印染废水 中试 脱盐 影响因素 

分 类 号：X703[环境科学与工程—环境工程]